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Income Taxes - Additional Information (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Income Taxes [Line Items]
United States statutory tax rate	35.00%	35.00%	35.00%
Temporary difference related to undistributed earnings	$ 12.7	$ 15.2
Unrecognized tax benefits change time	12 months
Net operating loss, carryforwards	$ 4.8

The domestic federal statutory tax rate applicable under enacted tax laws to the Company's pretax income from continuing operations for the period. The "statutory" tax rate is the regular tax rate if there are alternative tax systems.

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